help!

Airee • TTC #1. California born and raised. Baby dust to all you soon to be mommies out there 💖
I know there's no way to know. 
I went to the docs and they told me my LMP was wrong & I wasn't as far along as I thought. He told me my HCG level was low (865). They couldn't see the baby on the ultrasound. I was super dizzy yesterday. I haven't bled at all, my cramps are small and short ( within the norm)
My boobs hurt, I pee frequently. What do you guys think? I go in today to get blood work done and I'm so terrified